package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.TimeoutUtils;
import org.springframework.web.bind.annotation.*;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //清理所有菜品缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器对象
        Page<Dish> pageInfo=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo,queryWrapper);
        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list=records.stream().map((item)->{
            DishDto dishDto=new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    /**
     * 根据id删除一个或批量删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        // 增加日志验证是否接收到前端参数。
        log.info("根据id删除一个菜品:{}", ids);
        //执行删除。
        dishService.deleteWithFlavor(ids);
        return R.success("删除菜品成功");
    }

    /**
     * 更新售卖状态
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> updateMulStatus(@PathVariable Integer status,Long[] ids){
        for (int i = 0; i < ids.length; i++) {
            Long id=ids[i];
            //根据id得到dish菜品
            Dish dish=dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        return R.success("菜品信息修改成功");
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

//    /**
//     * 根据条件查询对应的菜品数据
//     * @param dish
//     * @return
//     */
    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!= null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/


    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtos=null;
        //动态构造key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();//dish_397844263642378242_1
        //先从Redis中获取数据
        dishDtos = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtos!=null){
            //存在，返回，无需查询数据库
            return R.success(dishDtos);
        }

        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!= null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        dishDtos=list.stream().map((item)->{
            DishDto dishDto=new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> flavorLambdaQueryWrapper=new LambdaQueryWrapper<>();
            flavorLambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //select * from dish_flavor where dish_id=?
            List<DishFlavor> dishFlavors = dishFlavorService.list(flavorLambdaQueryWrapper);
            dishDto.setFlavors(dishFlavors);
            return dishDto;
        }).collect(Collectors.toList());
        //不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtos,60,TimeUnit.MINUTES);
        return R.success(dishDtos);
    }

}
